US3576891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of esters and acids from tertiary-butyl alcohol solutions
Assignee: Atlantic Richfield Co
•
Filing: 1967-11-06
•
Granted: 1971-04-27
•
Expires: 1987-11-06
Abstract
Abstract METHOD FOR REMOVING ESTERS AND ACIDS FROM A TERTIARYBUTYL ALCOHOL SOLUTION BY PASSING THE SOLUTION IN VAPOR PHASE OVER A SUPPORTED ALKALI METAL HYDROXIDE CATALYST.
Inventors
- 👤 Rudolph Rosenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:28
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/88
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |